Perpetual calendar of the roller type



Nov. 7, 1933. E KRUG 1,933,812

PERPETUAL CALENDAR OF THE ROLLER TYPE Filed March 3, 1932 Patented Nov. 7, 1933 UNITED STATES Emil Krug, Mannheim, Germany Application March 3, 1932, Serial No. 596,484, and in Germany November 5, 1931 1 Claim.

This invention relates to an improved and simplified perpetual calendar of the type which is set daily and as required by rotatable parts bearing the ciphers and other particulars for deter- 5. mining the day, month and if desired year orany desired seasonal reminders.

Such adjustable calendars as hitherto known and composed. of material such as metal have involved the use of more or less elaborate outer casings or frames with journals for the rotatable setting members and oth r complications which render them expensive to manufacture, liable to injury and inconvenient to set. The object of the present invention is to simplify the construc- 1 tion of such calendars whilst retaining or improving their reliability, simplicity and efiicacy.

The invention consists of a calendar having in combination a plurality of separately and independently rotatable parts arranged co-axially side by side and furnished with various peripheral v markings indicating months, days, tens units and the like and a casing containing and retaining these parts and having an axial display slot to reveal the particular markings for a single date Iand open access for the fingers to the rotatable parts to set the same.

The invention is illustrated by way of example in the'accompanying drawing in which:

Figure 1 is a perspective View of oneform of 301rol1er calendar according to this invention.

Figure 2 shows a second form and Figure 3 is a section on the line 3-3 of Fig. 2. The perpetual roller calendar according to this invention may be arrangedas of the desk or wall 351type, but for the sake of illustrating the invention the desk type only has been shown. In the form seen in Fig. 1, the casing a is of cylindrical form which may be either a complete cylinder with the necessary openings as herein described 40i or a partial cylinder as shown in the second form herein illustrated. This cylinder or cylindrical casing may be made of a wide variety of materials such as cardboard, wood, metal sheet or celluloid. The casing is at one of its ends closed by a fixed .101- solid end I) and has its other end closed by a cover 0 which permits of the placing of the interior parts. Within the casing there are several separate and independently rotatable parts lettered d, e, f, g, h, i, k, m arranged side by side and co- 9 axially, the axis being that of the cylindrical casing a in which the rotatable parts (1, e, f, g, etc. may be a good working fit. The rotatable parts are shown as mounted on a spindle n which passes from and to end of the casing a and finds its support in ring-like members 0, inset in the end 1) (Cl. ili ll) The casing a is provided with a slit a, which may 0 r be sunciently wide, measured circumferentially to enable the fingers to have access to the separatediscs or rotatable parts, cl, e, f, g, h, i, k, m to set these parts so that the required particulars for a single date are displayed through the slit a.

The display slit a, may, if desired be made narrow and the rotatable parts cim may be moved by the fingers through slots of suitable length arranged, say on the rear side of the cylindrical casing from that shown in the drawing. The 70. legends or markings of the various discs or rotatable parts dm are indicated on the drawing, the two end parts being shown as blank. These may be used for advertising matter, customers telephone numbers or any other data desired. It will also be understood that the number of rotatable parts may be varied without departing from this invention. The rotatable parts bearing their peripheral markings preferably moved with a small amount of friction so as to prevent in- 9 advert-displacement after the parts have been i set. The casing with the roller calendar parts may be supported on a desk stand q which may form a pen stand, ash tray or perform any other useful purpose if desired.

In the form of this invention shown in Figs. 2 and 3 the cylindrical casing is only continued for one half of the diameter, the cylindrical part 1- passing over to the prismatic part 1", both these parts being "formed conveniently from one piece of sheet metal. The front stand part is formed by a sloping table 1' which may act as a note block or the like and then the base is formed by folding round the end 1 of the plate, this end stopping short of the wall r, so as to leave an opening r in the base through which the fingers may pass to set the rotatable parts e, fg and h which are mounted co-axially and side by side on the spindle 'n. The particulars required to indicate a single date are thus brought as required opposite the display slot m which may be relatively narrow, measured circumierentially.

. A feature of importance inthis invention is the simple form of one part casing herein employed and the direct setting of the peripherally marked .0 discs through an opening or openings in the easing, thus dispensing with all external handles, knobs or the like with their journals and bearings. The article also may come within a price limit which enables it to be used as an advertising 1 means, for which purpose the discs d and m may be employed as well as the outer surface of the casing if so desired.

Having now particularly described and ascertained the nature of my invention and in What manner the same is to be performed, I declare that What I claim is:

A perpetual calendar comprising in combination separate discs bearing on their peripheries the ciphers and like markings for days, tens, units and the like, an essentially prismatic casing having its upper part semi-cylindrically formed and carrying at this part a small slot to reveal the corresponding portion of the periphery of the 

